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3 years ago

Find the value of the expression if x=12. 1. 3x

Mathematics

2 answers:

Marizza181 [45]3 years ago

3 0

Answer:

Step-by-step explanation:

X equals 12, substitute X for 12

3(12)=36

sergij07 [2.7K]3 years ago

3 0

Answer: 36

3(12) =36

[insert the value of x which is 12 into where x is in the expression]

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Each week Danny eats 540 grams of cereal over 8 weeks. He finishes a total of 12 boxes of cereal. Each box contains the same amo

leonid [27]

Answer:

360 grams of cereal

Step-by-step explanation:

First you have to do 540 times 8 to find out how many grams of cereal he ate over the eight weeks.

Then you have to divide the answer by 12 to get 360 grams of cereal.

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ELEN [110]

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3 years ago

X2 + 4x - 21 = 0 quadratic formula

Elena-2011 [213]

Answer:

Step-by-step explanation:

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3 years ago

A rectangular prism measures 3ft by 6ft by 5ft. If the dimensions of the box were all quadrupled. How would the surface area of

Blababa [14]

The surface area of a shape is the amount of space on the shape

When the dimensions are quadrupled, the new surface area would be 16 times the initial surface area

<h3>How to determine the surface area</h3>

The surface area of a rectangular prism is:

$S = 2 * (lw + lh + wh)$

When quadrupled, we have:

$S_2 = 2 * (16lw + 16lh + 16wh)$

Factor out 16

$S_2 =16 * 2 * (lw + lh + wh)$

Substitute $S = 2 * (lw + lh + wh)$

$S_2 =16 * 2 * S$

The above means that:

The new surface area would be 16 times the initial surface area